Flaming arc-lamp.



G. L. MARTIN a. A. W. SGHRBINBR.

FLAMING ARC LAMP. APPLIOATION FILED PBB.17, 1909.

Patented Dec; '7. 1909.

2 SHEETS-SHBBT 2.

. in Fig. 2, and the rods 15 pass in any suitable manner.

UNITED sTATEs PATENT oEEicE.

GEORGE L. MARTIN, 0F BROOKLYN, AND ARTHUR W. SCHREINER, OF EVERGREN, LONG ISLAND, NEW YORK, ASSIGNORS TO SAID GEORGE L. MARTIN.

FLAMING ARC-LAMP.

Specification of Letters Patent.

942,730. Patented Dec. 7, 1909.

Application'le February 17, 1909. Serial No. 478,437.

tion of the lamp frame, and of course when the supporting rod S is moved they move up or down with it as will be readily understood.

In order to move the holders 3 up and therefore the carbons carried thereby, there is provided on the sleeve 9 a spring pawl or -other friction device 1G adapted to be engaged by a rack 17 or other surface. 'This rack is given a vertical movement by means of the core 18 of the solenoid 19 through the adjustable connection 2O carried by the core, and the connection 21 carried by the lug 22 fixed to the rack. 23 represents a suitable plunger carried by the core 18, and 24 a perforated cylinder in which said plunger works, in order to permit a gradual ingress and egress of air the whole constituting a dash pot. The cylinder and solenoid are supported from the frame plate 11 as shown and in addition the st-iifening brackets QS `may be supplied. It is evident that when the solenoid is energized the core 18 will rise and carry with it through the connections described the rack 17, sleeve 9 and cai-bons 1. On the other hand it is also evident that if the rack 17 should be laterally moved so as to disengage the pawl 16, there would be nothing to hold the carbons in their elevated position, and therefore they would descend under the act-ion of gravity. In order to secure a lateral movement of the rack 1T, its ends are provided with the ca ms 3() and 31 on one side of the rack bar, and the cams 32 and 33 on the other side. These cams pass through slots in theibrackets 34C and adjustably secured by the set screws 3G and 37 to the fixed rod 10. It is therefore evident that as the rack bar rises when in its full line position shown in Fig. 3, it will move longitudinally parallel to itself and carry the pawl 1G and sleeve 9 with it, but when it descends, the engagement of the cams 30 and 31 with the brackets 34 and 35, will force staid bar to move laterally parallel with its length into the dotted line position shown in Fig. 3. In this latter position the pawl 1G will be disengaged and the carbons unsupported by the rack bar. AIt is also evident that, as the bar begins to rise from its dotted line position the cams 32 and 33 will come into action to laterally move said bar tcward thepawl 16, and that ,if this counter lateral movement is `quick To all whom it may concern:

Be it known that we, GEORGE L. MARTIN and ARTHUR vW. SGHREINER, citizens of the United States, residing, respectively, at Brooklyn, in the county of Kings and State of New York, and Evergreen, Long Island, i New York, have invented certain new and useful Improvements in Flaming Arc- Lamps; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others Skilled in the art to which it appertains to make and use the same.

Our invention relates to feed mechanisms for arc lamps and the invention consists in the novel details of construct-ion and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

Referring to the accompanying drawings forming a pant of this'speeiiication in which like numerals refer -to like parts in all the views :1 -Figure 1 is an elevational view partly in section showing the invention applied to a lamp of the flaming are type, Fig. 2 is a like view of the invention when seen at right angles4 to that of Fig. 1, Fig. 3 is an enlarged detail view of the feed mechanism proper, Fig. fl a sectional detail view taken on the line 4 4 Fig. 3 and Fig. 5 a diagram of one form of the circuits employed.

1 represents the earbons which are of such a composition and are here illustrated in such a relation as to produce a iaming arc 2, but it will be understood that the invention is not confined to this type of lamp. Said carbone are held in the supports 3 which accommodate the feed wires l and carry at any suitable point the brackets 5 insulated as at from said support, and preferably provided with the antifriction devices 7. rlhese brackets 5 are extended, as shown through the extreme ends 5 of the same as indicated in Fig. 2. Through the brackets 5 suitably passes the supporting rod- S' as shown. This rod is provided with a sleeve 9 which slides on the vertical guide rod 10 ixed lto the upper frame plate 11 and the economizer 12 The carbon holders 3, are provided with the usual sliding bearings on the usual inclined iiXed guide rods15 constituting a porenough after the pawl is disengaged the said pawl will be caught before it has fallen very ar. In fact, 4if the action is suiciently quick the pawl may be dropped only a tooth 5 at a time, nomatter how close the teeth may be. Also secured to the sleeve 9 is a cord or other flexible connection 38 which preferably passes over the antifriction devices 39 and 40 supported on the frame plate 11, and which carries at its other end a counterbalancing Weight 41, preferably housed in the cylinder 42. The weight 41 is so chosen that it leaves a slight preponderance of weight in the carbons, even after they have been partially consumed and when the rack 17 is disengaged from the pawl '1G the carbons will slowly descend under the action of gravity. As the carbons are inclined as shown, their tips approach as they descend thereby reducing the resistance between their points and increasing the current through the coils of the solenoid 19, which as shown in Fig. 5 are in series with the are. But an increase of current through the solenoid, of course, causes the carbons to lift and their tips to separate through the connections above described, and therefore the current through the solenoid is immediately decreased and the carbon tips again allowed to approach under the action of gravity. In other words, it is clear that if the carbons did not burn away, their tips would be automatically kept at a substantially constant distance. apart, so that a substantially constant or steady are would be produced. As the tips burn away however, this condition is not disturbed, for no rnatter how much they may be consumed, it only results in separating them, and so far as the operation of the rack is concerned, a separation of the tips merely, means more resistance in the lamp cireult and therefore'a dropping of the carbons to restore the normal current. As a matter of fact,` as the carbons burn away, the pawl 1G and the rackl'? slowly work their way downward, descending about one inch per hour, and the brackets 311 and 35 being adjustable thereby can be secured at the proper position, thereby to allow the cams 30, 31, 32 and 33 to come into action.

The economizer 12 may be of any suitable construction, but it is preferred to provide it with detachable cooling bosses 45 made of any suitable material for example of composition metal, or other suitable alloy, such as brass; and 'it isv re erred to provide one of these bosses wit a small arc steadying piece 46 of iron or steel not electrically connected with the lamp circuit to insure 60 the steadiness of the flaming are by offering a conducting path of less resistance for the magnetic lines of force than that offered by the air or the composition metal of the bosses. The less resistance offered to the magnetic lines of force by this steadying 'seance piece 46, causes said lines of force to be more numerous in its neighborhood, than would otherwise be the case, and` as said lines of Aforce control the are` said pieceis found to have a steadying etl'ect upon the are, in economizers. The action of economizers being well' known, no further description is necessary, except to point out the advantages of being able to readily rcnew these cooling bosses or the steadying piece when they burn out, asithey often do. The screws or other fastenings 47 are pijovided for this purpose.

TheI operation of the invention will be clear from the foregoing but may be briefly summarized as follows: 'l`o start. the hun] the carbon tips being together, the curren is turned on as usual, whereupon the solenoid armature raises the rack and the latter raises and separates the cai-bons until the resistance is right for the al'c. As the carbons burn away, the resistance increases, the rack and carbons therefore fall under the action of. gravity and the tips are brought closer together. As the .earbons continue to burn away the cam surfaces on the rack will cause the rack tn become disengaged from the pawl 1(3,Vapd the said pawl will move longitudinally of the rack until the tips have been adjusted suiliciently to make up for the consumption. It' will be observed that this automatic feed does away with the usual clock work and numer- -ous magnets; with the necessary forks or pegs for holding or adjusting the carbon points and which Vconstantly burn out; that the cooling bosses can be readily removed and .1"enewed; that the lamp is adapted for a direct current when. two are in series at 110 volts ac: ss the line; or four lamps can be used in series at 220 volts; that the same mechanism may be used on both alternate current and direct current circuits with the usual change in alternate current magnet control; that by the use of a transformer one or more lamps may be joined in multiple while a large number of other lamps are on one circuitA for 'street lighting. It. will be also 'obsericd that there are no complicated clock gears or blow devices to get out of order; and that the cam surfaces compel positive lateral motions of the rack bar in both directions so that nothing is left to clnune.

It evident that other clutch mechanisms between the bar and sleeve t) may be utilized, and that those skilled-in the art, may vary the details of construction and the movement of parts without departing from the spirit of the invention and thereforewe do not wish to be limited to the details disclosed except as may be rerpiired by thc claims.

lhat we claim is 1. ln a feed mechanism 'tor are lamps, the combination of a magnet, a bar provided cam surfaces; carbon supports; a clutchy with camV surfaces at each end an 'adjustable l brackets on said rod against which said cam connection between the armature of said magnet and said bar for controlling Said mechanism between said suppo'is' and said bar; and adjustable means coacting with said cam surfaces to move said bar laterally and to disenga e said bai' from said clutch mechanism; sustantially as described.

2. In a -feed mechanism for aming arc lam sfprovided with inclined carbons, the

com ination of a magnet; a bar provided with cam surfaces controlled thereby; earboii supports; a clutch mechanism between said supports and said bar; and adfust-able means coacting with said cam sur aces to move said bar laterally to disengage said bar from said clutchmechanism; subst-antially as described. p

3. In a feed mechanism for arc lamps, the combination of a' imagnet; a bar controlled thereby and provided with cam surfaces at each end; carbon supports adapted to fall under gravity when re eased; a clutch mechanism between said supports and said bai' adapted to be released from said bar at intervals; and adjustable brackets with which said cam surfaces contact at intervals and thereby compel said bar to disengage said clutch mechanism, substantially as described. 4. In an arc lamp feed mechanism, the

i combination of a solenoidal magnet; a core therefor; a bar providedwith cam surfaces at each end; connections between said core and said bar; carbon supports; a clutch mechanism between said supports and said bar comprising a sleeve; a rod on which said sleeve slides, and brackets on said iod against which said cam surfaces cont-act, sub` stantially as described.

fixed rod on which said sleeve slides; and

surfaces contact, substantially .as described. 6. In an arc lamp feed mechanism, the combination of a solenoidal ma et; a core' "therefor; a perforated cylindered to said magnet and a piston sliding"-therein fixed to said core; a bar provided with caniA surfaces at each end; connections between said core and said bar; carbon supports; a clutch mechanism between said supports and said bar comprising a sleeve; a suppoi'tin rod 8 connectin said supports and said s eeve; a countei'baa a flexible connection etween said Lweight and sleeve; a rod on which said sleeve slides; and brackets on said rod againstwhich said cam surfaces contact, substantially as de- 7. In a feed mechanism for arc'lamps, tlm combination of aV rod provided with teeth and a plurality-of cams; means -for causing said rod to move upwardly and permitting ncing wei ht for said supports;

the same to move downwardly; adjustable brackets adapted to enga e saidcams andto cause said rod to move aterally and\disengage said pawl in its downward movement; carbon supports; and a' connection between said supports and said pawl; sub-v stantially as described. V

8. In a feed mechanism for arc lam s, provided with inclined carbons, the com iiiatioii of a rod provided with teeth; a pawl engaging said teeth; means, comprising an electro-magnet for causing said rod to move up and down; an adjustable connection between the armature of said magnet and said rod; means comprising cam surfaces oii said rod for causing the same to move laterally and disengage said pawl; carbon supports; a. counterbalance for the carbons and their supports; and connections between said supports and said pawlQcomprising the antifriction rollers 7; substantially as described In testimony whereof, we affix our signatures; in presence of two witnesses.

GEORGE L. MARTIN. ARTHUR W. SCHREINER. lVitnesses l HENRY THoMrsoN, N. A. NELSON. 

